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#include "RTX_PCI6208.h" /* 本文件中的几个函数曾经在Ardence RTX下检测通过。用于PCI-6208/16的DA输出。 用法: (1)、DWORD dwBaseAddr = _6208_Init(PCI卡序号,设备ID,制造商号);只有一块PCI卡时,PCI卡序号为0.多块卡时,在机器主板上PCI插槽从0开始检测, 第一次遇到的插槽不为空时,PCI卡序号 = 0,第二次遇到的插槽不为空时,PCI卡序号 = 1, ... ,PCI卡序号 = n. (2)、int nStatus = _6208_GetDAStatus(dwBaseAddr);获取端口状态寄存器的状态。当寄存器为空就输出。 (3)、void _6208_DAOutPut(dwBaseAddr,输出通道Channel,输出数字量Value); (4)、void _6208_Fail("想要输出的错误提示信息");初始化发生错误时,输出错误信息并终止程序 (5)、UCHAR _6208_DI_ReadPort(DWORD dwAddr);从dwAddr端口读取数字信号 (6)、void _6208_DO_WritePort(DWORD dwAddr,UCHAR uValue);从dwAddr端口输出数字信号 (7)、BOOL _6208_CloseCard(DWORD dwAddr);关闭PCI6208卡初始化时返回的地址。 */ DWORD _6208_Init(const UINT CardIndex,unsigned short DeviceID,unsigned short VendorID) { ULONG uDeviceNum = 0; //设备号 ULONG uFunNum = 0; //功能号 ULONG uBusNum = 0; //总线号 ULONG uOffset = 0; //偏置,用于检索插槽是否为空,空则为0,相邻插槽关联常数为256。 ULONG uNothingToWrite = 0; //获取PCI配置空间失败. ULONG uBytesWritten = 0; //获得PCI配置空间信息。一般为64字节。 BOOL bFlag = 0; // UINT uIndex = 0; //当系统中存在多块相同PCI卡时检索之用。 DWORD _base_addr = 0; //返回的基地址 //================================================================================================ PCI_SLOT_NUMBER SlotNumber; PPCI_COMMON_CONFIG PciData; UCHAR chBuffer[PCI_COMMON_HDR_LENGTH]; PciData = (PPCI_COMMON_CONFIG)chBuffer; SlotNumber.u.bits.Reserved = 0; bFlag = TRUE; for(uBusNum = 0; bFlag ;uBusNum++) { for(uDeviceNum = 0;uDeviceNum < PCI_MAX_DEVICES && bFlag ;uDeviceNum++) { SlotNumber.u.bits.DeviceNumber = uDeviceNum; for(uFunNum = 0; uFunNum < PCI_MAX_FUNCTION; uFunNum++) { SlotNumber.u.bits.FunctionNumber = uFunNum; uBytesWritten = RtGetBusDataByOffset(PCIConfiguration,uBusNum,SlotNumber.u.AsULONG,PciData,uOffset,PCI_COMMON_HDR_LENGTH); if(uBytesWritten == uNothingToWrite) { RtWprintf(L"NothingWritten!"); printf("Error ByteWritten = %d\n",uBytesWritten); uDeviceNum = PCI_MAX_DEVICES; bFlag = FALSE; break; } if(PciData->VendorID == PCI_INVALID_VENDORID) //如果VendorID等于0xFFFF,表示PCI卡错误,进行下一个循环 { break; } if((PciData->DeviceID == DeviceID) && (PciData->VendorID == VendorID) && uDeviceNum == CardIndex) { //设置命令参数用于访问PCI设备的控制寄存器 PciData->Command = (PCI_ENABLE_IO_SPACE | PCI_ENABLE_MEMORY_SPACE | PCI_ENABLE_BUS_MASTER | PCI_ENABLE_WRITE_AND_INVALIDATE); RtSetBusDataByOffset(PCIConfiguration,uBusNum,SlotNumber.u.AsULONG,PciData,0,PCI_COMMON_HDR_LENGTH); _base_addr = PciData->u.type0.BaseAddresses[2] & 0xfffffffe; return _base_addr; } } } } return 0; } int _6208_GetDAStatus(DWORD dwAddr) { if(dwAddr == 0) { return -1; } return (RtReadPortUshort((PUSHORT)dwAddr) & 0x0001); } //DA输出 void _6208_DAOutPut(DWORD dwAddr,int nChannel,double dValue) { if(dValue < -9.9999999) { dValue = -9.9999999; } else if(dValue > 9.9999999) { dValue = 9.9999999; } while(_6208_GetDAStatus(dwAddr)); RtWritePortUshort((PUSHORT)(dwAddr + nChannel*2),(USHORT)(dValue * 32767/10.0)); } void _6208_DO_WritePort(DWORD dwAddr,UCHAR nValue) { RtWritePortUchar((PUCHAR)(dwAddr + 0x40),nValue); } UCHAR _6208_DI_ReadPort(DWORD dwAddr) { UCHAR nValue = 0; nValue = RtReadPortUchar((PUCHAR)(dwAddr + 0x40)) >> 4; return nValue; } BOOL _6208_CloseCard(DWORD dwAddr) { if(dwAddr != 0) { dwAddr = 0; return TRUE; } else { return FALSE; } } //初始化发生错误时,输出错误信息并终止程序 void _6208_Fail(char *mesg) { RtPrintf("Fatal Error: %s (0x%X)\n", mesg, RtGetLastError()); ExitProcess(1); }